iShares iBoxx Dollar Investment Grade Corporate Bond (LQD)

And this was all pure jawboning.

The Fed is, of course, prevented by law from purchasing equities and corporate bonds directly. They get around this restriction by 'loaning' funds to Special Purpose Vehicles (cough...cough...Blackrock) who do the buying on behalf of the Fed.

To date, the Fed (through its loans to SPVs) has not purchased a single share of ANY ETF. No investment grade bond ETF's nor any junk bond ETF's.

Loans on the Fed balance sheet (for the week ending April 15) totaled $120 B which was down slightly from the prior week. The largest portion of these loans, $52 B, is for the Money Market Mutual Fund Liquidity Facility. Second largest component is Primary Credit, at $41 B. The balance for Secondary Credit (which includes corporate bonds, corporate bond ETF's and junk bond ETF's) shows a balance of zero.

As LQD plunged, the shorts soared, rising to never before seen levels, send the index even lower and sparking even more shorting. By this point, only one thing could save capital markets - both bonds and stocks (why stocks? Because as a reminder the only buyer of stocks in the past decade have been buybacks; kill the bond market and suddenly companies can't issue debt to fund buybacks and it's bye bye, not buy buy, stocks): the Fed had to step in and buy bonds

However, on quad-witching Friday, March 20, the Fed did not do what so many traders were now expecting, and the liquidation continued with stocks in freefall, sending the Dow below 19,000, and to levels not seen since the Trump election.

By the following Monday, the Fed was trapped - either it unleashes not a bazooka but a "nuclear bomb" (as Paul Tudor Jones called it) and stabilizes the unprecedented panic gripping traders, or the market was about to close. It picked the former, and before the open on Monday, March 23, the Fed announced not only unlimited QE, but in an unprecedented move, Powell said he would also start buying loans and bonds in the secondary market, as well as the LQD.

This fund was Nationalized by the Fed on March 20th, 2019 as it went bidless on March 19

Holding up well considering...

I wonder how this would perform through a default and increased cost of debt.

http://us.ishares.com/product_info/fund/overview/LQD.htm